3. The Way of Knowledge
We shall find, if we try, that the mind has this power of detachment and can stand back from the body not only in idea, but in act and as it were physically or rather vitally. This detachment of the mind must be strengthened by a certain attitude of indifference to the things of the body; we must not care essentially about its sleep or its waking, its movement or its rest, its pain or its pleasure, its health or ill-health, its vigour or its fatigue, its comfort or its discomfort, or what it eats or drinks. This does not mean that we shall not keep the body in right order so far as we can; we have not to fall into violent asceticisms or a positive neglect of the physical frame. But we have not either to be affected in mind by hunger or thirst or discomfort or ill health or attach the importance which the physical and vital man attaches to the things of the body, or indeed any but a quite subordinate and purely instrumental importance. Nor must this instrumental importance be allowed to assume the proportions of a necessity; we must not for instance imagine that the purity of the mind depends on the things we eat or drink, although during a certain stage restrictions in eating and drinking are useful to our inner progress; nor on the other hand must we continue to think that the dependence of the mind or even of the life on food and drink is anything more than a habit, a customary relation which Nature has set up between these principles. As a matter of fact the food we take can be reduced by contrary habit and new relation to a minimum without the mental or vital vigour being in any way reduced; even on the contrary with a judicious development they can be trained to a greater potentiality of vigour by learning to rely on the secret fountains of mental and vital energy with which they are connected more than upon the minor aid of physical aliments.
[CWSA 23: 343-344]